Can you please quote the verses in those chapters where it says the messiah will come back from the dead? Thanks.
Here is the one in Isaiah 55 that the Acts of the Apostles refers to regarding the supposed resurrection of the Messiah:
Incline your ear, and come unto Me; hear, and your soul shall live; and I will make an everlasting covenant with you, even the sure mercies of David. Behold, I have given him for a witness to the peoples, a prince and commander to the peoples. Behold, thou shalt call a nation that thou knowest not, and a nation that knew not thee shall run unto thee; because of the LORD thy God, and for the Holy One of Israel, for He hath glorified thee (Isaiah 55.3-5, JPS 1917).
Here is the one in Psalm 16 that the Acts of the Apostles refers to regarding the supposed resurrection of the Messiah:
I have set the LORD always before me; surely He is at my right hand, I shall not be moved.
Therefore my heart is glad, and my glory rejoiceth; my flesh also dwelleth in safety;
For Thou wilt not abandon my soul to the nether-world; neither wilt Thou suffer Thy godly one to see the pit.
Thou makest me to know the path of life;
in Thy presence is fulness of joy, in Thy right hand bliss for evermore (Psalm 16.8-11, JPS 1917).
Therefore my heart is glad, and my glory rejoiceth; my flesh also dwelleth in safety;
For Thou wilt not abandon my soul to the nether-world; neither wilt Thou suffer Thy godly one to see the pit.
Thou makest me to know the path of life;
in Thy presence is fulness of joy, in Thy right hand bliss for evermore (Psalm 16.8-11, JPS 1917).
In the passage from Isaiah, the audience is Am Yisrael. There appears to be a promise to renew the Davidic covenant. It may involve either a resurrected David or the reign of his descendants. In the passage from the Tehillim, David does not seem to speak of resurrection but of being protected from death. Indeed, the first verse in the Psalm itself says, 'Preserve me.'